FISHERMAN,
I just went to the urcctvstore downloads section and retrieved the file. It was on an amazon file server. I then put the file on a clean usb stick (although it does not have to be clean). Put the stick in the nvr and went to the upgrade area. (note: you must be plugged into a tv or monitor and have a mouse, I was not able to get it to work through web interface) Once it is upgraded you must reboot immediatly. One other thing is make sure you go in order of firmwares, don't skip one to upgrade.